Changing a 3 wire Honeywell thermostat

[sambomartin]

Hi all,

I'm about to replace a faulty (old) thermostat in hallway.

Thought it would be straightforward switch over, but wiring diagrams seem different.

I just wondered whether someone could confirm the wiring based on the original wiring diagram.

See pictures

Old thermostat

Untitled

• sambomartin
• 12 Dec 2013
• 1

new thermo

Untitled

• sambomartin
• 12 Dec 2013
• 1

I'm thinking from the old one, the top wire is 1 on the new, the second is neutral (3 on new), and the old bottom wire is 2 on the new.

Any info appreciated.

thanks,
sam[/img]

 

[Gas2Air]

Yep.

 

[Whitespirit66]

No.

Second wire/neutral on old should go to 2 on new.

Old bottom wire is 3 on new.